Submariner Red - Replacing Parts

[Mfidler]

Have a family watch that is a Rolex Submariner 6536 with red lettering on the depth. In really bad shape. Sending it out to Rolex for service. I am curious what users think about this. If Rolex has the parts to replace most of the pieces (from it's original year with correct parts), is it worth it to maintain it's value? Getting the piece properly fixed is something I am very interested in, but still want to know value. Let me know. I have attached two pictures. Forgive the bad pics.